Process of forming a clevis



Sept. 8, 1925.

c. E. ANDERSON PROCESS OFFORMING A CLEvIs Filed Nov. 29, 1920 Patented Sept. 8, 1925. Y y

UNITED STATES PATENT OFFICE.

CARI. E. ANDERSON, kOE GRAND HAVEN, MICHIGAN, AssIGNoR lro ROLLING MANUFAC- TURING COMPANY, or GRAND HAVEN, MICHIGAN, A CORPORATION or MICHIGAN.

:PROCESS F FORMING A CLEVIS.

Applicationmed November 29, 1920. Serial No. 426,950.

To all whomz'tmay concern: cle at the end of the sixth stage of the Be it known that I, CARL E. ANDERSON, process; a subject of King Gustaf V of Sweden, resid- Fig. 8 shows a longitudinal section throu h Aing at Grand Haven, in the county of,0ttawa the completed clevis formed by -bending t .e and State of Michigan, have invented eerarms of the article, as illustrated in Fig. 7; 55

tain new vand useful Improvements in a and Process of Forming a C1evis,fof which the Fig. 9 shows a side elevation of the comfollowing is a specification. pleted clevis after, the cylindrical portion This invention relates to an improved thereof has been' threaded. article of manufacture and to an improved The article is formed from a blank 10'of 60 process of vforming the saine. The princicold sheet steel or the like of uniform thickpal object of the invention is to provide an ness, the blank" consisting of a circular cenimproved form of clevis or similar article tral portion 10 and two .oppositely directed and to furnish an improved method of rectangular arms 10". After the blank has stamping and pressing the article from a been 'formed,.it is operated upon by a unch 95 single sheet of metal. Devicesiof this :kind and die to force the central part own-v Y have heretofore been forged or formed ofy wardlyv and form a cup-shaped portion 11'l 1 wrought iron, with the resultV that the cost as illustrated in Fig. 2. The next step of of manufacture has beenvery 'great and sufthe processconsists in shearing off the latfeient strength could not be obtained in areral edges of'the enlarged central portion, 70

tides of Small Size these parts' being cut away as shown in Fig. The various'objects and advantages of the 3t0 remove the portions 12, thus givingthe invent-ion will a pear more clearly from .the central part a lateralcontour 13` which can be following speci cation taken in connection -securely ripped during the succeeding oper- 25 with the accompanying Adrawings in which atlons. f he r-article having the form shown Il one embodiment isillustrated. i in Fig. 3 is theiiplaced between two clamp- In the drawings- `Iing members 14, a's shown in Fig. 5, these kFigure ll'shows ato lan view of the members having irregular surfaces adapted sheet metal `blank whic is formed as 'the to fit the irregular surfaces 13 on the oppo- 'first step in the vprocess of manufacture; site sides of the blank. The central cupl0 Fig.' 2 shows a side elevation of the sheet shapedpart is then reduced in diameter and metal blank after the central part `thereof increased in depth, las illustrated by the has been depressed; vdotted lines 15in Fig. 4,`until it assumes a Fig. 3 shows a top plan view of the blank substantially cylindrical shape. The next 8l at the end of the next succeeding stage of stage of the operation consists in flattening Il the process after vthe lateral edges of the the end of the central cylindrical portion central part have been trimmed olf; and punching'the ends of the arms 10 to Fi 4shows a lon itudinal section through form two bosses or projections 17. An aperthe lank, illustrating the 'fourth stage of -ture 18'is then formed through the circular (0 the process which consists in contracting end of thev central cylinder 19 and apertures 00 and increasing the depth of the central de- 20 are punched through the bosses 17, as pression until .it assumes substantially the shown in Fig. 6. 'After these operations form of va cylinder; l have been completed, the outer edges of-the Fig. 5 shows a top plan View of the blank, lateral arms 10L are `trimmedolf to remove illustrating the method of holding it during the portions illustrated by dotted lines 21 u the fourth stage of the process; in Fig. 7, thus -giving smooth curved lateral Fig. showsalongit'udinal section through edges to each of the projecting arms of the the blank, illustratingthe for'm of the ararticle. The final stage of the process conticle after the fifth stage ofthe rocess; sists in bendin the arms' 10a until they lie 5 Fig. 7 shows a top plan view o the arti` parallel to eac other and parallel to the 1" axis of the cylinder 19, as shown in Fig. 8f The article may be used in the form shown in Fig. 8 or the cylinder 19 may be internally threaded as shown at 22 in Fig. 9 to enable it to be readily attached to a rod or the like.

VThe clevis formed by this great strength and is capable o beingrapidly formed at a very small cost. The invention is articularly adapted for the formation ofpsmall clevises and connecting members, such as those which are used-on process -has the brake rods of automobiles for example.

The formation of the bosses 17 is adapted to increase the wearing surface on the side of the clevis.

Although I have illustrated one form of article to be formed by'this process and have described certain steps of the process as being performed in a certain order, it will be understood that various changes may be made in the article and in the process of forming the same without departing from end of said depression and through the ends of said arms, and bending said arms into parallel relation. 3. The process of forming a clevis which comprises cutting a-sheet-metal blank'having a circular central portion with oppositely projecting arms, forming a depression in said central portion, bendin said arms into positions parallel with eac other, and forming an aperture through the bottom of said depression.

4. TheV process of forminga clevis, which consists in forming a sheet-metal blank having an enlarged central portion and oppositely projecting arms, forming acylindrical depression in said central portion, .trimming o the metal from opposite sides of said central portion, and bending said arms into parallel relation.

5. The process of forming an article of manufacture, which consists in forming a sheet-metal blank having an enlarged central portion and oppositely projecting arms, forming a depression in said central portion, trimming 0E the vmetal on opposite sides of said central partion to :form surfaces of irregular contour conforming to the ll manufacture, which consists in forming a I0 sheet-metal blank havin an enlarged central portion and opposite y projecting` arms,

forming a depression` insaid central portion, trimming oil the metal on opposite sides of said central portion to form sur- Yfaces of irregular contour conforming to-the curvature of said depression, further drawing the metal of said depression to impart a cylindrical contour to its walls, and forming bosses on the ends of said arms. 7. The process of forming an article of manufacture,whichxconsists in forming a sheet-metal blank having an enlarged central portion and oppositelyiprojecting arms, forming a depression inl said central por.

"tion, trimmingol the metal on opposite sides of said central portion to form surfaces of irregular contour conforming'to the curvature ofsaid'depression, further dra-wing the metal ofsaid depression'to impart a cylindrical contour to its walls, forming bosses on the ends of said arms, and bending said armsV into a position parallel to the axis' of said cylindrical depression.

8. The process of forming an article of manufacture, which comprisesthe operations of punching a sheet-metal blank to form a ing the walls of said depression into substantially cylindrical form, forming bosses 'depression in the central part thereof,'draw on the ends of said blank on opposlte sides c of said depression, and bending the arms of said blank on opposite sides of said de-` i pression into positions substantially parallel with the axis of said depression.

9. The process of forming an article of manufacture, which comprises the operations of forming a sheet-metal blank having a'central portion and oppositely proa jecting arms, forming a depression in said central portion, drawing the walls of said depression to impart a substantially cylindrical contour thereto, trimming the metalrom .opposite sides of said depression to impart an irregular contour to the lateral edges ofthe blank-forming bosses inea-r` the en s of said' arms, Vpunching 'apertures A,

through' saidbosses and'through the "end" wall of said depression, trimimingfthe metal from the lateral edges of said arms, and bending said arms into positions ,substantially parallel with the longitudinal anis of said cylindrical depression.

10. The process of forming a clevis from a sheet-metal blank having an enlarged central portion and two oppositely projecting arms, which comprises "the'operation of forming an aperture through said 'central and bending said arms into parallel relation.

11. The process of forming a clevis from a sheet-metal blank having 5 tral portion,v

an enlarged cenand two oppositely projecting arms, which comprises the operations of forming a cylindrical proje ction on said, central portion, ormingan aperture through said projection, forming apertures through the end portions of said arms, and bending 10 said arms into parallel relation.

In testimony whereof, 'I have subscribed my name.l CARL E. ANDERSON. 

